根據(jù)以下資料，回答53~56題。

　　It used to take Redwood City, California police hours to locate gunfire.Now, they have a new tool that helps them find the gunfire quickly.This new tool is called the Shot Spotter, The police began using the Shot Spotter in 1995.They wanted to cut down on gunfire in their city.

　　One Shot Spotter covers a square mile.Eight microphones are put on the roofs of buildings.These microphones pick up gunfire noise.It only takes seven seconds to report the gunfire to the police.Then a red dot on the police map shows where the action is.

　　The Shot Spotter really works well.It locates the gunfire within 20 to 40 feet plus or minus.Redwood City police are very happy with the Shot Spotter.They think it might have helped catch the D.C.sniper.

　　Shot Spotters cost a lot of money.One of them sells for $200,000.Despite the cost, Shot Spotters can be a big help in fighting crime.

　　第53題 Eight microphones placed on rooftops __.

　　A.talk to police

　　B.warn the public

　　C.listen for gunfire

　　D.play rap music

　　【正確答案】：

　　C

　　試題解析：

　　參見第二段：麥克風(fēng)放在房頂上是為了監(jiān)聽到打槍的聲音。

　　第54題 The red dot on the police map shows __.

　　A.the address of the criminal

　　B.Redwood City

　　C.the capital of California

　　D.the location of the gunfire

　　【正確答案】：

　　D

　　試題解析：

　　參見第二段：警察地圖上的紅點表明槍聲的具體位置。

　　第55題 The Shot Spotter has helped police __.

　　A.a little bit

　　B.cut down the use of weapons

　　C.tremendously

　　D.solve all the shootings

　　【正確答案】：

　　C

　　試題解析：

　　參見倒數(shù)第一段和第二段。

　　相關(guān)推薦：

　　考試吧10月13日考后首發(fā)2012成人高考試題及答案

　　2012成人高考專升本《大學(xué)語文》預(yù)測試題匯總

　　2012年成人高考專升本《英語》高頻詞匯匯總

　　成人高考?xì)v年真題匯總